Machine for molding concrete pipe



I Dec. 22, 1942. J. w. COLVIN MACHINE FOR MOLDING CONCRETE PIPE 3 Sheets-Sheet 1 Filed Jmp 20, 1942 Inventor John/W @aZvz'n/ By WWW Dec. 22, 1942. .1. w. COLVIN MACHINE FOR MOLDING CONCRETE PIPE Inventor A fikwWCbZvz'rv Filed Jan. 20, 1942 3 Sheets-Sheet 2 m m m Dec. 22, 1942.

J. w. COL-VIN 2,306,037

MACHINEFOR MOLDING CONCRETE PIPE 3 Sheets-Sheet 3 Filed Jan. 20, 1942 I I u i'entor j WC'aZva'w By Mgw W-%m,

Patented Dec. 22, 1942 UNITED STATES PATENT OFFICE,

2,306,037 MACHINE FOR MOLDING CONCRETE PIPE John W. Colvin, Glendale, Ariz. Application January 20, 1942, Serial No. 427,495

3 Claims.

The present invention relates to new and useful improvements in poured pipe machinery, and has for its primary object to provide, in a manner as hereinafter set forth, an apparatus of this character comprising a novel construction and arrangement whereby concrete pipe may be rapidly and continuously poured with a minimum of labor.

Another very important object of the invention is to provide a continuous poured concrete pipe apparatus of the aforementioned character which will facilitate the employment of a metallic lining in the upper portion, only of the completed pipe.

Still another very important object of the invention is to provide a continuous poured pipe apparatus of the character described which embodies unique means for forming and finishing the inside of the pipe.

A still further important object of the invention is to provide an apparatus of the aforementioned character which includes novel means for providing a gate on the pipe.

Other objects of the invention are to provide a. continuous poured concrete pipe machine which will be comparatively simple in construction, strong, durable, highly efiicient and reliable in use, compact, light in weight and which may be manufactured at low cost. All of the foregoing and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompaning drawings wherein like characters of reference designate corresponding parts throughout the several views, and wherein:-

Figure 1 is a top plan view of a concrete pipe which has been poured with an apparatus constructed in accordance with the present inven tion, a portion ofsaid pipe being broken away in horizontal section for exposing a portion of the metallic lining, together with an end portion of the core constituting a part of said apparatus.

Figure 2 is a view in vertical longitudinal section, taken substantially on the line 2-2 of Figure 1.

Figure 3 is a view in end elevation, showing the lining in position to be set.

Figure 4 is a view substantially similar to Figure 3, but showing the lining after it has been set.

Figure 5 is a cross-sectional view through the completed pipe, taken substantially on the line 5-5 of Figure 1.

I slidably front. elevation of the Figure 13 is av detail view in perspectiveof one of the blanks from which the metallic guides for theslidable gate are formed.

Referring to the drawings in detail, it will be seen that the embodiment of the apparatus which. has been illustratedv comprises a cylindrical core 1., of suitable. metal, which core may be of any desired length and diameter. The cylindrical corev I includes an inturned rear end portion 2. Mounted on the forward end of the corel is a. metallic bar 3i. Fixed on the bar 3 and projecting forwardly therefrom is a nipple or. the like 4. A. hand lever 5 is journaled for swinging movement on the nipple 4. Threaded on the nipple 4 is a retaining nut 6 for the lever 5.. The. forward end portion, of the cylindrical core I has formed therein an opening 1. Mounted on the hand lever 5 is a spring projected pin 8 which is engageable in the opening 1 for connecting. the core I to thereby.

Operable in the pipe behind the core I is a longitudinally split inside finisher 9 of substantially the shape shown to advantage in Figures 2 and 6 of the drawings, said insidefinisher including inturned marginal portions I0. Mounted transversely in the finisher 9 at an intermediate point is a pin or the like H. A T-coupling I2 on the pin H has threaded thereinto one end portion of an operating rod l3. The rod I3 is of tubular construction and extends through the nipple 4, said rod passing through an opening which is provided therefor in the bar 3. It will be noted that the inside finisher 9 does not contact the upper portion of the pipe.

In use, a trench or ditch M of substantially the cross-sectional shape shown to advantage in Figures 3 and 4 of the drawings is dug. Into this ditch a quantity of soft concrete I5 is poured.

the lever 5 for rotation The cylindrical core I is then placed in this soft concrete and tamped and settled. Additional concrete is then poured into the ditch up to substantially one-half of the height of the core I, as seen in Figure 3 of the drawings. A foraminous lining section I6 is then posi ioned over the core I, said lining including outturned flanges H on its longitudinal edges which rest on the concrete which has been poured. An elongated setting tool or device l8 of arcuate cross-section, and comprising a handle I9, is then engaged on the lining 16 for seating said lining on the upper portion of the core I and embedding the flanges H in the concrete which has been poured. When this has been done, the tool the concrete for completing this portion of the pipe is then poured and worked over the lining IS. The core I is then pulled forwardly through the medium of the lever for pouring the next portion of the pipe. By utilizing the lever 5 for rotating the core, any vacuums that mayiform will be broken, thereby facilitating moving said core. After the core I has been moved forwardly, the member 3 is actuated through the medium of the rod 13 for finishing the interior of the pipe below the lining l6.

Any desired number of valve stacks or vents 28 may communicate with the pipe. Toward this end, a mold 2| is provided. The mold 21 includes a tubular core 22 of uniform diameter and a tapered form 23 which receives said core. Lift I8 is removed.- The rest of of the panel 34 the bendable metallic guides 23 for the slidable gate 28.

When using the gate mold 30, the panel 34 is engaged with the rear end of the core I with the metallic guides 29 secured in position by the nails 35. As seen in Figure 11 of the drawings, the flat metallic guides 29 project beyond the exposed face of the panel 34. The concrete is then poured and allowed to set. The cross-member 33 is then knocked off and the mold .30 is removed. The portions of the guides 29 whichproject free of the panel 34 are embedded in the concrete. Thus, when the mold 30 is removed, the guides 29 are left in the concrete. Portions of the guides 29 are left exposed and these portions are bent inwardly for engagement 'th the gate 28. The large headed nails 35 readily release the guides 29 when the ing handles 24 are provided on the form 23. Fixed on top of the core-22 is a rod 25 which extends across the form 23. 1

An opening 26 is formed in the concrete l5 of the pipe before said concrete hardens. After the concrete has hardened, an opening 21 is cut in the lining IS in alignment with the opening 26. The mold 21 is then positioned on the pipe in alignment with the openings 26 and 21, as seen in Figure 2 of the drawings, and the concrete forming the stack or vent is poured between the members 22 and 23. The bar 25 supports the core 22 on the form 23 to be lifted therewith.

On one end of the pipe is a vertically slidable metallic gate 28. Metallic guides 29 are provided for the gate 28, said guides being embedded in the concrete.

For constructing the gate a mold 30is provided. The mold 30 includes what may be considered a plate 3| of suitable construction, material and dimensions, said plate having secured on its vertical: marginal portions a pair of bars 32. Extending between the upper portions'of the bars 32 is a cross-member 33. Mounted on the front of the plate 3| is a vertically elongated panel 34. Nails 35 are driven into the vertical edges of the panel 34, said nails comprising large heads which are spaced from the panel. The nails 35 are for releasably securing in position on the vertical edges mold 30 is removed.

It is believed that the many advantages of a continuous poured concrete pipe apparatus in accordance with the present invention will be readily understood, and although a preferred embodiment of said apparatus is'as illustrated and described, it is to be understood that changes in the details of construction and in the combination and arrangement of parts may be resorted to which will fall within the scope of theinvention as claimed.

What is claimed is: V.

1. A continuous poured concrete. pipemachine comprising a substantially cylindrical tubular core, a bar mounted on one end portion of said core, a hand lever journaled on said bar, and means for releasably connecting said hand lever to the core for rotating said core.

2. A continuous poured concrete pipe machine of the character described comprising a substantially cylindrical, tubular core, a bar mounted on one end of said core, a nipple mounted on said bar, a rod passing longitudinally through the core and extending slidably through the bar and the nipple, an inside finisher pivotally mounted on one end of the rod, a hand lever journaled on the nipple, and means for releasably connecting said lever to the core for rotating said core. 7

3. A continuous poured concrete pipe machine of the character described comprising a substantially cylindrical, tubular core, a bar mounted on one end of said core, a nipple mounted on said bar, a rod passing longitudinally'through the core and extending slidably through the bar and the nipple, an inside finisher pivotally mounted on one end of the rod, a hand lever journaled on th nipple, and means for releasably connecting said lever to the core for rotating said core, said means including a pin slidably mounted on the lever, the core having an opening therein for the reception of said pin.

' JOHN W. COLVIN. 

